WO2013073243A1 - 新規化合物及びこの新規化合物を担持した担持体 - Google Patents
新規化合物及びこの新規化合物を担持した担持体 Download PDFInfo
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- WO2013073243A1 WO2013073243A1 PCT/JP2012/071093 JP2012071093W WO2013073243A1 WO 2013073243 A1 WO2013073243 A1 WO 2013073243A1 JP 2012071093 W JP2012071093 W JP 2012071093W WO 2013073243 A1 WO2013073243 A1 WO 2013073243A1
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- 0 CC[n]1c(ccc(-c2c*(*)c(-c3cc(*)c(-c4cc(*)c(-c5cc(*)c(C=C(C(N(C[*+](*=*)c6ccc7)Cc6c7F)=O)C#N)[s]5)[s]4)[s]3)[s]2)c2)c2c2c1cccc2 Chemical compound CC[n]1c(ccc(-c2c*(*)c(-c3cc(*)c(-c4cc(*)c(-c5cc(*)c(C=C(C(N(C[*+](*=*)c6ccc7)Cc6c7F)=O)C#N)[s]5)[s]4)[s]3)[s]2)c2)c2c2c1cccc2 0.000 description 7
- WBZYPTLUOUWFFU-XDJHFCHBSA-N CC[n]1c(cccc2)c2c2c1ccc(/C=C(/C(Nc(cc1)ccc1SCC)=O)\C#N)c2 Chemical compound CC[n]1c(cccc2)c2c2c1ccc(/C=C(/C(Nc(cc1)ccc1SCC)=O)\C#N)c2 WBZYPTLUOUWFFU-XDJHFCHBSA-N 0.000 description 1
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- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
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- Y02E10/542—Dye sensitized solar cells
Definitions
- the present invention relates to a novel compound, a carrier on which the novel compound is supported on a carrier, and a photoelectric conversion element using the carrier.
- dyes are widely used in various technical fields.
- dyes having a photosensitizing action are used for dye-sensitized photoelectric conversion elements.
- This dye-sensitized photoelectric conversion element can be expected to have a theoretically high efficiency and is considered to be manufactured at a lower cost than a conventional photoelectric conversion element using a silicon semiconductor.
- the dye-sensitized photoelectric conversion element has an electrode having an oxide semiconductor using a dye carrier.
- this dye-sensitized photoelectric conversion element light incident on the element is excited by the dye, and photoelectric conversion is performed by the excited dye injecting electrons into the carrier.
- an object of the present invention is to provide a novel compound, particularly a novel compound as a dye exhibiting a high adsorptivity to a carrier, a carrier carrying the novel compound on a carrier, and a highly efficient and highly durable photoelectric conversion element. It is to be.
- the present invention provides a novel compound represented by the following general formula (1).
- Y is a hydrocarbon group having 1 to 20 carbon atoms which may be substituted and having —CO—NR 4 — or —SO 2 —NR 4 — in the group, and Z is a conjugated group.
- Each of R1, R2 and R3 represents a hydrocarbon group which may be substituted or a hydrocarbonoxy group which may be substituted, and at least one of R1, R2 and R3 may be substituted
- R4 represents a hydrogen atom or an optionally substituted hydrocarbon group having 1 to 20 carbon atoms, and R4 and Z may be linked to each other to form a ring.
- Y excludes groups represented by the following partial structural formulas (Y-11) and (Y-12).)
- R4 is the same as R4 described in formula (1) above, and the hydrogen atom in the formula is a fluorine atom, chlorine atom, bromine atom, iodine atom, cyano group, nitro group, —OR7 group, (It may be substituted with —SR7 group or —NR7R8 group, and the benzene ring in the formula may be substituted with an aliphatic hydrocarbon group having 1 to 4 carbon atoms.)
- the present invention also provides a carrier carrying a compound represented by the following general formula (1).
- Y is a hydrocarbon group having 1 to 20 carbon atoms which may be substituted and having —CO—NR 4 — or —SO 2 —NR 4 — in the group, and Z is a conjugated group.
- R1, R2 and R3 represents a hydrocarbon group which may be substituted or a hydrocarbonoxy group which may be substituted, and at least one of R1, R2 and R3 may be substituted
- R4 represents a hydrogen atom or an optionally substituted hydrocarbon group having 1 to 20 carbon atoms, and R4 and Z may be linked to each other to form a ring.
- the present invention also provides a photoelectric conversion element provided with an electrode having the support.
- the novel compound of the present invention Since the novel compound of the present invention has a silyl group in which a hydrocarbon oxy group and Si are bonded, it has excellent adsorptivity to a carrier. Therefore, the carrier of the present invention carrying the novel compound is capable of peeling off a dye. In addition, a photoelectric conversion element using the carrier is a highly efficient and highly durable element, and is suitable for applications requiring high durability such as solar cells.
- FIG. 1 is a schematic diagram showing a cross-sectional configuration of an example of the photoelectric conversion element of the present invention.
- FIG. 2 is an enlarged view of the main part of the photoelectric conversion element of the present invention shown in FIG.
- the novel compound of the present invention and the carrier of the present invention will be described.
- the material (carrier) used for the carrier of the present invention include organic resins such as acrylic resins and fluororesins, metal oxides such as titanium oxide, zinc oxide, and aluminum oxide, silicon oxide, zeolite, activated carbon, and the like. Those having a porous surface are preferred.
- the compound to be supported is a compound represented by the above general formula (1). Since the compound has a silyl group in which a hydrocarbon oxy group and Si are bonded to each other, the compound has a high adsorptive power to the carrier.
- known methods such as gas layer adsorption and liquid layer adsorption can be used. For example, as an example of liquid layer adsorption, the compound of the present invention is dissolved in a solvent. And a method of adsorbing the carrier by immersing the carrier in the solution.
- the shape of the carrier is not particularly limited, and may be appropriately selected depending on the use of the carrier from, for example, a film shape, a powder shape, a granular shape, and the like. Further, the size of the carrier and the amount of the compound of the present invention supported on the carrier of the present invention are not particularly limited, and may be appropriately selected depending on the use of the carrier.
- the group represented by Y in the above general formula (1) is a divalent group and may be substituted hydrocarbon group having 1 to 20 carbon atoms and having —CO—NR 4 — or —SO 2 —NR 4 —. It is.
- the hydrocarbon group which may be substituted include an aliphatic hydrocarbon group, an unsubstituted aromatic hydrocarbon group, an aromatic hydrocarbon group substituted with an aliphatic hydrocarbon group, an unsubstituted heterocyclic group, and an aliphatic carbon group.
- Examples include a heterocyclic group substituted with a hydrogen group.
- the divalent aliphatic hydrocarbon group is a linear, branched or cyclic aliphatic hydrocarbon group, and specifically includes methane-1,1-diyl, ethane-1,2-diyl, 1- Methylethane-1,2-diyl, propane-1,3-diyl, butane-1,4-diyl, 2-methylpropane-1,3-diyl, pentane-1,5-diyl, hexane-1,6-diyl , Heptane-1,7-diyl, octane-1,8-diyl, nonane-1,9-diyl, decane-1,10-diyl, cyclohexane-1,4-diyl and the like.
- methane-1,1-diyl, ethane-1,2-diyl, and 1-methylethane-1,2-diyl are preferable because the conversion efficiency
- divalent unsubstituted aromatic hydrocarbon group examples include 1,2-phenylene, 1,3-phenylene, 1,4-phenylene and the like.
- divalent unsubstituted heterocyclic group examples include furan-2,5-diyl, furan-3,5-diyl, thiophene-2,5-diyl, thiophene-3,5-diyl, 2H-chromene-3,7. -Diyl, benzothiophene-2,6-diyl, benzothiophene-2,5-diyl and the like.
- divalent aromatic hydrocarbon group substituted with an aliphatic hydrocarbon group and the divalent heterocyclic group substituted with an aliphatic hydrocarbon group include, for example, the above divalent unsubstituted aromatic hydrocarbon group and Examples thereof include those in which a hydrogen atom of an unsubstituted heterocyclic group is substituted by 1 to 3 positions with an aliphatic hydrocarbon group having 1 to 4 carbon atoms.
- Examples of the aliphatic hydrocarbon group having 1 to 4 carbon atoms include linear, branched, and cyclic groups such as methyl, ethyl, propyl, isopropyl, butyl, s-butyl, t-butyl, isobutyl, cyclopropyl, and cyclobutyl.
- an aliphatic hydrocarbon group having 1 to 4 carbon atoms includes —O—, —COO—, —OCO—, —CO—, —S—, —SO—, —SO 2 —, — NR12—, —C ⁇ C—, —C ⁇ C— may be interrupted, and R12 is an aliphatic hydrocarbon group having 1 to 4 carbon atoms, and examples thereof include those having 1 to 4 carbon atoms. When the interrupting group contains a carbon atom, the number of carbon atoms including the interrupted group is 1 to 4.
- the aliphatic hydrocarbon group, aromatic hydrocarbon group or heterocyclic group mentioned above may be further substituted, and the aliphatic hydrocarbon group, aromatic hydrocarbon group and heterocyclic group may be substituted.
- the group include a fluorine atom, chlorine atom, bromine atom, iodine atom, cyano group, nitro group, —OR7 group, —SR7 group, —NR7R8 group and the like.
- R7 and R8 represent the same groups as R7 and R8 in formulas (A2-1) to (A2-15) described later.
- two hydrogen atoms may be substituted by the same oxygen atom and carbonyl may be sufficient.
- preferred specific examples of the group represented by Y include those represented by the following partial structural formulas (Y-1) to (Y-10).
- preferred specific examples of the group represented by Y include the following partial structural formulas (Y-1) to (Y-10) and the following partial structural formula (Y -11), and those represented by (Y-12).
- R4 is the same as described in the general formula (1), and in the formula, May be substituted by a group which may substitute the above aliphatic hydrocarbon group, aromatic hydrocarbon group and heterocyclic group, and the benzene ring in the formula is an aliphatic group having 1 to 4 carbon atoms. It may be substituted with a group hydrocarbon group.
- Z is not particularly limited as long as it is a ⁇ -conjugated group, and may have a substituent.
- the group containing a nitrogen atom in the ⁇ -conjugated group represented by Z or substituting Z is preferably an amino group.
- the ⁇ -conjugated group means that unsaturated bonds are formed continuously, and among the ⁇ -conjugated groups represented by Z, it is continuous in that the conversion efficiency of the photoelectric conversion element described later is increased.
- the unsaturated bond formed preferably has 4 to 60 carbon atoms, and more preferably 12 to 40 carbon atoms.
- the connection number of the smallest unsaturated bond carbon represents the said preferable range.
- ⁇ -conjugated group represented by Z includes one represented by the partial structural formula (2).
- A1 is an optionally substituted aromatic hydrocarbon ring group or an optionally substituted aromatic heterocyclic group, and A2 is a direct bond or the following formulas (A2-1) to (A2-15)
- R5 and R6 represent an optionally substituted hydrocarbon group, and R5 and R6 are linked to each other to form a ring.
- R5 and R6 may be linked to A1 independently of each other to form a ring.
- X represents S, O, NR
- R represents a hydrogen atom or an optionally substituted hydrocarbon group
- the hydrogen atom in the formula represents a fluorine atom, a chlorine atom, an iodine atom, or a cyano group.
- a nitro group, a —OR7 group, a —SR7 group, a —NR7R8 group, or an optionally substituted aliphatic hydrocarbon group, and R7 and R8 may be a hydrogen atom or a substituted carbon atom Represents a hydrogen group.
- the group represented by A1 in the partial structural formula (2) is a divalent group and is an optionally substituted aromatic hydrocarbon ring group or an optionally substituted aromatic heterocyclic group.
- the aromatic hydrocarbon ring group include an unsubstituted aromatic hydrocarbon ring group and an aromatic hydrocarbon ring group substituted with an aliphatic hydrocarbon group.
- the aromatic heterocyclic group includes an unsubstituted group. An aromatic heterocyclic group, an aromatic heterocyclic group substituted with an aliphatic hydrocarbon group and the like can be mentioned.
- Divalent unsubstituted aromatic hydrocarbon ring groups include 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, naphthalene-1,2-diyl, naphthalene-1,3-diyl, naphthalene- 1,4-diyl, naphthalene-1,5-diyl, naphthalene-1,6-diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2, 6-diyl, anthracene-1,4-diyl, anthracene-1,5-diyl, anthracene-1,10-diyl, anthracene-9,10-diyl, perylene-3-10-diyl, perylene-3,10- Examples thereof include diyl, pyrene-1,
- Examples of the divalent aromatic hydrocarbon ring group substituted with an aliphatic hydrocarbon group include, for example, an aliphatic hydrocarbon group having 1 to 20 carbon atoms in which the divalent unsubstituted aromatic hydrocarbon ring is 1 to The one substituted at three places is mentioned.
- Examples of the aliphatic hydrocarbon group having 1 to 20 carbon atoms include methyl, ethyl, propyl, isopropyl, butyl, s-butyl, t-butyl, isobutyl, amyl, isoamyl, t-amyl, hexyl, heptyl, isoheptyl.
- Linear, branched and cyclic alkyl groups such as t-heptyl, n-octyl, isooctyl, t-octyl, nonyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl,
- divalent unsubstituted aromatic heterocyclic group examples include furan-2,5-diyl, furan-3,5-diyl, thiophene-2,5-diyl, thiophene-3,5-diyl, and 2H-chromene-3. , 7-diyl, benzothiophene-2,6-diyl, benzothiophene-2,5-diyl and the like.
- Examples of the divalent aromatic heterocyclic group substituted with an aliphatic hydrocarbon group include 1-alkyl-pyrrole-2,5-diyl, 1-alkyl-pyrrole-3,5-diyl, An unsubstituted aromatic heterocyclic group is substituted with an aliphatic hydrocarbon group having 1 to 20 carbon atoms at 1 to 3 positions.
- the aliphatic hydrocarbon group having 1 to 20 carbon atoms is the same group as described above.
- the aromatic hydrocarbon ring group or aromatic heterocyclic group listed above may be further substituted, and the group that may substitute the aromatic hydrocarbon ring group and aromatic heterocyclic group is a fluorine atom. Chlorine atom, bromine atom, iodine atom, cyano group, nitro group, hydroxyl group, thiol group, —NR7R8 group and the like. R7 and R8 represent the same groups as R7 and R8 in the above formulas (A2-1) to (A2-12). Moreover, when it has a methylene in an aromatic hydrocarbon ring group or an aromatic heterocyclic group, two hydrogen atoms may be substituted by the same oxygen atom and may be carbonyl.
- A2 in the partial structural formula (2) is a group in which 1 to 7 groups selected from direct bonds or groups represented by the formulas (A2-1) to (A2-15) are linked, preferably 2 Up to 4 linked groups.
- the groups represented by the above formulas (A2-1) to (A2-15) can be connected in any direction.
- * means that a group represented by these formulas is bonded to an adjacent group at the * portion (the same applies hereinafter).
- X represents S, O or NR
- R represents a hydrogen atom or an optionally substituted hydrocarbon group.
- the optionally substituted hydrocarbon group represented by R is the same as those exemplified later as the optionally substituted hydrocarbon group represented by R1, R2 and R3.
- the hydrogen atoms contained in the groups represented by the above formulas (A2-1) to (A2-15) are fluorine atom, chlorine atom, bromine atom, iodine atom, cyano group, nitro group, —OR7 group, —SR7 group , —NR7R8 group or an optionally substituted aliphatic hydrocarbon group, R7 and R8 each represents a hydrogen atom or an optionally substituted hydrocarbon group. These groups that substitute A2 may be linked to each other to form a ring.
- Examples of the aliphatic hydrocarbon group which may be substituted include the above-mentioned aliphatic hydrocarbon groups having 1 to 20 carbon atoms, and the substituent which may substitute them is an aromatic hydrocarbon This is the same as those exemplified as the group which may substitute the cyclic group and the aromatic heterocyclic group.
- the above-mentioned optionally substituted hydrocarbon groups represented by R7 and R8 are the same as those exemplified later as the optionally substituted hydrocarbon groups represented by R1, R2 and R3.
- A1-A2 portion in the partial structural formula (2) include the following A (1) to (36).
- A1 the ring structure at the left end is A1, and the other part corresponds to A2.
- A1 may have a substituent and the hydrogen atom in A2 may be substituted by the substituent.
- the bond described over a plurality of rings means that the bond is bonded to any of carbon atoms constituting those rings (the same applies hereinafter). .
- the hydrocarbon group of the hydrocarbon group which may be substituted represented by R1, R2 and R3 in the general formula (1) is an aromatic hydrocarbon group or an aromatic hydrocarbon substituted with an aliphatic hydrocarbon.
- the aromatic hydrocarbon group include phenyl, naphthyl, cyclohexylphenyl, biphenyl, terphenyl, fluoryl, thiophenylphenyl, furanylphenyl, 2′-phenyl-propylphenyl, benzyl, naphthylmethyl, and the like.
- Examples of the aromatic hydrocarbon group include aliphatic hydrocarbon groups having 1 to 20 carbon atoms used in the description of A1, and examples of the aromatic hydrocarbon group substituted with the aliphatic hydrocarbon group include the aliphatic hydrocarbon group described above. And phenyl, naphthyl, benzyl and the like substituted with an aromatic hydrocarbon group.
- Examples of the group that may substitute these hydrocarbon groups include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a cyano group, a nitro group, a hydroxyl group, a thiol group, and a —NR7R8 group.
- the group to be represented is the same as R7 and R8 described in A2.
- the optionally substituted hydrocarbon oxy group represented by R1, R2 and R3 is a group between the optionally substituted hydrocarbon group represented by R1 and the Si atom. It is interrupted by O-.
- the group represented by R1, R2, and R3 is a hydrocarbon oxy group that is optionally substituted.
- at least one of R 1, R 2 and R 3 is an aliphatic hydrocarbon oxy group or a hydrocarbon oxy in which all of R 1, R 2 and R 3 may be substituted from the viewpoint of excellent adsorptivity to the carrier described later. It is a group. More preferably, 2 to 3 of R1, R2 and R3 are linear or branched aliphatic hydrocarbon oxy groups (particularly those having 1 to 5 carbon atoms), and 0 to 1 are linear or branched.
- Examples of the optionally substituted hydrocarbon group represented by R5 and R6 in the partial structural formula (2) include the groups used in the description of R1, and R5 and R6 are connected to each other to form a ring. R5 and R6 may be independently linked to A to form a ring.
- a compound in which the following partial structure (3) is any one of the following partial structures (3-1) to (3-12) is particularly favorable for photoelectric conversion applications. It is preferable because of its characteristics. In particular, those having a skeleton of the following partial structure (3-1), (3-2) or (3-10) are preferred because they are easy to produce and have high electron injection efficiency into the carrier.
- the bond from A1 to A2 is not shown.
- the bond from A1 to A2 may be attached to any carbon atom constituting the aromatic hydrocarbon ring or aromatic heterocycle.
- R9, R10 and R11 represent a known ligand coordinated to M2, M1 and M2 represent a metal element,
- the hydrogen atom therein may be substituted with a fluorine atom, chlorine atom, iodine atom, cyano group, nitro group, —OR7 group, —SR7 group or an optionally substituted aliphatic hydrocarbon group, R7 and R8 represents a hydrogen atom or an optionally substituted hydrocarbon group.
- (3-6) representing the partial structure (3) as the metal element of M1, specifically, Mg, Ca, Sr, Ba, Sc, Y, La, Ce, Pr, Nd, Sm, Eu Gd, Tb, Dy, Ho, Sn, Yb, Ti, Zr, Hf, V, Nb, Ta, Th, U, Mn, Cu, Cr, Fe, Co, Zn, Mo, Ni, Rh, etc.
- Mn Mn, Cu, Cr, Fe, Co, Zn, Mo, Ni, Rh, etc.
- Cu, Ti, Ni, Fe, and Zn are preferable, and Cu or Zn is more preferable.
- examples of the metal element of M2 include metals capable of tetracoordination or hexacoordination, and more preferably Ru, Fe, Os, Cu, W, Cr, Mo, Ni, Pd, Pt, Co, Ir, Rh, Re, Mn, Zn, more preferably Ru, Fe, Os, Cu, and particularly preferably Ru.
- the known ligand coordinated to M2 represented by R9, R10 and R11 is monodentate, bidentate or tridentate.
- the ligand may be a neutral ligand or an anionic ligand.
- Specific ligands are not particularly limited, but preferably include a halogen atom, —NCS, oxalic acid, and the like, and more preferably a halogen atom, —NCS.
- Examples of the novel compound represented by the general formula (1) are as follows. Examples of the compound include 1 to 73, but are not limited thereto.
- Me is a methyl group
- Et is an ethyl group
- Pr is a propyl group
- Bu is a butyl group
- Hex is a hexyl group
- Oct is an octyl group
- Non is a nonyl group
- Dec is a decyl group
- TBA is a tetrabutylammonium group. Represents.
- the compound represented by the general formula (1) of the present invention can be obtained by a method using a known or well-known general reaction, and the synthesis method is not particularly limited.
- a typical synthesis method a carboxylic acid of a conjugate having a carboxylic acid group is converted into an acid chloride, and then a primary or secondary amine compound having a silyl group is reacted to give the above general formula ( The compound represented by 1) can be synthesized.
- the reagent used for the reaction may be changed as necessary, and the same synthesis can be performed when sulfonic acid is used instead of carboxylic acid.
- the carrier of the present invention carrying the novel compound of the present invention can be suitably used for a photoelectric conversion element described below, and can also be used for a catalyst, a toner, and the like.
- the photoelectric conversion element of the present invention is a dye-sensitized photoelectric conversion element, and can be the same as the conventional dye-sensitized photoelectric conversion element except that the novel compound of the present invention is used as the dye.
- a typical configuration example of the photoelectric conversion element of the present invention will be described with reference to FIGS.
- FIG. 1 schematically shows a cross-sectional configuration of an example of the photoelectric conversion element of the present invention
- FIG. 2 shows an enlarged and extracted main part of the photoelectric conversion element shown in FIG.
- the photoelectric conversion element shown in FIGS. 1 and 2 is a main part of a so-called dye-sensitized solar cell.
- the working electrode 10 and the counter electrode 20 are arranged to face each other with the electrolyte-containing layer 30 interposed therebetween, and at least one of the working electrode 10 and the counter electrode 20 is an electrode having optical transparency. It is.
- the working electrode 10 includes, for example, a conductive substrate 11, a metal oxide semiconductor layer 12 provided on one surface thereof (a surface on the counter electrode 20 side), and a dye 13 supported on the metal oxide semiconductor layer 12. And have.
- the dye 13 is the novel compound of the present invention represented by the above general formula (1), the novel compound of the present invention as a dye, and the metal oxide semiconductor layer carrying the same 12 is a carrier of the present invention.
- the working electrode 10 functions as a negative electrode for the external circuit.
- the conductive substrate 11 is obtained by providing a conductive layer 11B on the surface of an insulating substrate 11A.
- Examples of the material of the substrate 11A include insulating materials such as glass and plastic.
- the plastic is used, for example, in the form of a transparent polymer film.
- Examples of the plastic forming the transparent polymer film include tetraacetyl cellulose (TAC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and syndiotactic polystyrene ( Examples thereof include SPS), polyphenylene sulfide (PPS), polycarbonate (PC), polyarylate (PAR), polysulfone (PSF), polyester sulfone (PES), polyetherimide (PEI), cyclic polyolefin, and brominated phenoxy.
- TAC tetraacetyl cellulose
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- syndiotactic polystyrene examples thereof include SPS), polyphenylene sulfide (PPS), polycarbonate (
- Examples of the conductive layer 11B include a conductive metal oxide thin film including indium oxide, tin oxide, indium-tin composite oxide (ITO), or tin oxide doped with fluorine (FTO: F—SnO 2 ). , Gold (Au), silver (Ag), platinum (Pt) or the like, a metal thin film and metal mesh, those formed of a conductive polymer, and the like.
- the conductive substrate 11 may be configured to have a single-layer structure with, for example, a conductive material.
- a conductive material examples include indium oxide, tin oxide, Examples thereof include conductive metal oxides such as indium-tin composite oxide or tin oxide doped with fluorine, metals such as gold, silver or platinum, and conductive polymers.
- the metal oxide semiconductor layer 12 is a carrier that supports the dye 13, and has, for example, a porous structure as shown in FIG.
- the metal oxide semiconductor layer 12 is formed of a dense layer 12A and a porous layer 12B.
- the dense layer 12A is formed at the interface with the conductive substrate 11, is preferably dense and has few voids, and more preferably is a film.
- the porous layer 12B is preferably formed on the surface in contact with the electrolyte-containing layer 30, has a large space and a large surface area, and more preferably has a structure in which porous fine particles are attached.
- the metal oxide semiconductor layer 12 may be formed to have, for example, a film-like single layer structure.
- the term “support” refers to a state in which the dye 13 is chemically or physically or electrically bonded or adsorbed to the porous layer 12B.
- Examples of the material (metal oxide semiconductor material) included in the metal oxide semiconductor layer 12 include titanium oxide, zinc oxide, tin oxide, niobium oxide, indium oxide, zirconium oxide, tantalum oxide, vanadium oxide, yttrium oxide, and oxide. Aluminum, magnesium oxide, etc. are mentioned. Among these, titanium oxide and zinc oxide are preferable as the metal oxide semiconductor material because high conversion efficiency can be obtained. Further, any one of these metal oxide semiconductor materials may be used alone, or two or more of them may be used in combination (mixed, mixed crystal, solid solution, surface coating, etc.). A combination of titanium oxide and zinc oxide can also be used.
- Examples of the method for forming the metal oxide semiconductor layer 12 having a porous structure include an electrolytic deposition method, a coating method, and a firing method.
- the metal oxide semiconductor layer 12 is formed by electrolytic deposition, the fine particles are deposited on the conductive layer 11B of the conductive substrate 11 in the electrolytic bath liquid containing the fine particles of the metal oxide semiconductor material and the metal.
- An oxide semiconductor material is deposited.
- a dispersion liquid metal oxide slurry
- a dispersion liquid metal oxide slurry in which fine particles of a metal oxide semiconductor material are dispersed is applied on the conductive substrate 11, and then in the dispersion liquid. Dry to remove the dispersion medium.
- the metal oxide semiconductor layer 12 is formed by the sintering method
- the metal oxide slurry is applied onto the conductive substrate 11 and dried, as in the coating method, and then fired.
- the metal oxide semiconductor layer 12 is formed by an electrolytic deposition method or a coating method
- a plastic material or a polymer film material having low heat resistance can be used as the substrate 11A, and thus a highly flexible electrode is manufactured. Can do.
- the metal oxide semiconductor layer 12 may be processed using an organic base, a urea derivative, or a cyclic sugar chain.
- organic base include organic bases such as diarylamine, triarylamine, pyridine, 4-t-butylpyridine, polyvinylpyridine, quinoline, piperidine, and amidine.
- the treatment may be performed before or after adsorbing the dye 13 described below.
- the treatment method includes dipping treatment. When the treatment agent is solid, the dipping treatment may be performed after dissolving in an organic solvent.
- the dye 13 is, for example, adsorbed to the metal oxide semiconductor layer 12, and is capable of injecting electrons into the metal oxide semiconductor layer 12 by absorbing light and being excited. Contains more than one type of dye (sensitizing dye).
- the novel compound of the present invention represented by the general formula (1) corresponds to the dye 13.
- dye 13 should just contain at least 1 type of the novel compound of this invention represented by the said General formula (1), and may contain the other pigment
- other dyes include organic dyes (hereinafter referred to as other organic dyes) and organometallic complex compounds, and dyes having a group that can be adsorbed on the metal oxide semiconductor layer 12 (carrier) are preferable.
- organic dyes include eosin Y, dibromofluorescein, fluorescein, rhodamine B, pyrogallol, dichlorofluorescein, erythrosine B (erythrocin is a registered trademark), fluorescin, mercurochrome, cyanine dye, merocyanine disazo dye, trisazo dye, anthraquinone Dyes, polycyclic quinone dyes, indigo dyes, diphenylmethane dyes, trimethylmethane dyes, quinoline dyes, benzophenone dyes, naphthoquinone dyes, perylene dyes, fluorenone dyes, squarylium dyes, azurenium dyes, Examples include perinone dyes, quinacridone dyes, metal-free phthalocyanine dyes, metal-free porphyrin dyes, and metal-free azaporphyrin dyes.
- Organometallic complex compounds As an organometallic complex compound, an ionic coordination bond formed between a nitrogen anion and a metal cation in an aromatic heterocyclic ring, and a nonionic property formed between a nitrogen atom or a chalcogen atom and a metal cation Organometallic complex compounds having both coordination bonds, ionic coordination bonds formed by oxygen anions or sulfur anions and metal cations, and non-formations formed between nitrogen atoms or chalcogen atoms and metal cations And organometallic complex compounds having both ionic coordination bonds.
- copper phthalocyanine, titanyl phthalocyanine, cobalt phthalocyanine, nickel phthalocyanine, iron phthalocyanine and other metal phthalocyanine dyes, metal naphthalocyanine dyes, metal porphyrin dyes, metal azaporphyrin dyes and ruthenium, iron, osmium are used.
- ruthenium complexes such as bipyridyl metal complexes, terpyridyl metal complexes, phenanthroline metal complexes, bicinchoninic acid metal complexes, azo metal complexes, and quinolinol metal complexes.
- dye 13 may contain the 1 type (s) or 2 or more types of additive other than the above-mentioned pigment
- the additive include an association inhibitor that suppresses association of the compound in the dye, and specifically, a cholic acid compound represented by the chemical formula (13). These may be used alone or in combination of two or more.
- R91 is an alkyl group having an acidic group or an alkoxysilyl group.
- R92 represents a group bonded to any of the carbon atoms constituting the steroid skeleton in the chemical formula, and represents a hydroxyl group, a halogen group, an alkyl group, an alkoxy group.
- t is an integer of 1 to 5.
- the bond between the carbon atoms constituting the steroid skeleton in the chemical formula may be a single bond or a double bond.
- the counter electrode 20 is, for example, a conductive substrate 21 provided with a conductive layer 22 and functions as a positive electrode for an external circuit.
- Examples of the material of the conductive substrate 21 include the same materials as those of the substrate 11 ⁇ / b> A of the conductive substrate 11 of the working electrode 10.
- the conductive layer 22 includes one type or two or more types of conductive material and a binder as necessary. Examples of the conductive material used for the conductive layer 22 include platinum, gold, silver, copper (Cu), rhodium (Rh), ruthenium (Ru), aluminum (Al), magnesium (Mg), and indium (In). Examples include metals, carbon (C), and conductive polymers.
- binder used for the conductive layer 22 examples include acrylic resin, polyester resin, phenol resin, epoxy resin, cellulose, melamine resin, fluoroelastomer, and polyimide resin.
- the counter electrode 20 may have a single layer structure of the conductive layer 22, for example.
- the electrolyte-containing layer 30 includes, for example, a redox electrolyte having a redox pair.
- the redox electrolyte include I ⁇ / I 3 ⁇ system, Br ⁇ / Br 3 ⁇ system, quinone / hydroquinone system, Co complex system, and nitroxy radical compound system.
- a combination of a halide salt and a simple substance of halogen such as a combination of an iodide salt and simple iodine, or a combination of a bromide salt and bromine, or the like.
- halide salt examples include cesium halide, quaternary alkylammonium halides, imidazolium halides, thiazolium halides, oxazolium halides, quinolinium halides and pyridinium halides.
- examples of the iodide salt include cesium iodide, tetraethylammonium iodide, tetrapropylammonium iodide, tetrabutylammonium iodide, tetrapentylammonium iodide, tetrahexylammonium iodide, and tetraheptyl.
- Quaternary alkylammonium iodides such as ammonium iodide or trimethylphenylammonium iodide, imidazolium iodides such as 3-methylimidazolium iodide or 1-propyl-2,3-dimethylimidazolium iodide, 3-ethyl-2-methyl-2-thiazolium iodide, 3-ethyl-5- (2-hydroxyethyl) -4-methylthiazolium iodide or 3-ethyl-2-methylbenzothiazolium iodide Cheer such as de Lithium iodides, oxazolium iodides such as 3-ethyl-2-methyl-benzoxazolium iodide, quinolinium iodides such as 1-ethyl-2-methylquinolinium iodide, Examples include pyridinium iodides.
- bromide salt examples include quaternary alkyl ammonium bromide.
- combinations of halide salts and simple halogens combinations of at least one of the above-described iodide salts and simple iodine are preferable.
- the redox electrolyte may be, for example, a combination of an ionic liquid and a halogen simple substance.
- the above-described halide salt and the like may further be included.
- the ionic liquid include those that can be used in batteries, solar cells, and the like.
- the ionic liquid a salt having a melting point lower than room temperature (25 ° C.), or a salt that has a melting point higher than room temperature and is liquefied at room temperature by dissolving with another molten salt or the like is preferable.
- Specific examples of the ionic liquid include the following anions and cations.
- Examples of the cation of the ionic liquid include ammonium, imidazolium, oxazolium, thiazolium, oxadiazolium, triazolium, pyrrolidinium, pyridinium, piperidinium, pyrazolium, pyrimidinium, pyrazinium, triazinium, phosphonium, sulfonium, carbazolium, indolium, or those And derivatives thereof. These may be used alone or as a mixture of plural kinds.
- Specific examples include 1-methyl-3-propylimidazolium, 1-butyl-3-methylimidazolium, 1,2-dimethyl-3-propylimidazolium, 1-ethyl-3-methylimidazolium, and the like. .
- anion of the ionic liquid examples include metal chlorides such as AlCl 4 ⁇ or Al 2 Cl 7 — , PF 6 ⁇ , BF 4 ⁇ , CF 3 SO 3 ⁇ , N (CF 3 SO 2 ) 2 ⁇ , F ( HF) n - or CF 3 COO - or fluorine-containing substances such as ions, NO 3 -, CH 3 COO -, C 6 H 11 COO -, CH 3 OSO 3 -, CH 3 OSO 2 -, CH 3 SO 3 - Non-fluorine compound ions such as CH 3 SO 2 ⁇ , (CH 3 O) 2 PO 2 ⁇ , N (CN) 2 ⁇ or SCN ⁇ , and halide ions such as iodide ions or bromide ions. These may be used alone or as a mixture of plural kinds. Among these, iodide ions are preferable as the anions of the ionic liquid.
- the electrolyte-containing layer 30 may be a liquid electrolyte (electrolytic solution) obtained by dissolving the above-described redox electrolyte in a solvent, or a solid polymer electrolyte in which the electrolytic solution is held in a polymer substance. May be.
- a quasi-solid (paste-like) electrolyte containing a mixture of an electrolytic solution and a particulate carbon material such as carbon black may be used. Note that in a quasi-solid electrolyte containing a carbon material, since the carbon material has a function of catalyzing a redox reaction, the electrolyte may not contain a single halogen.
- Such a redox electrolyte may contain any one kind or two or more kinds of organic solvents that dissolve the above-described halide salts, ionic liquids, and the like.
- organic solvent include electrochemically inert ones such as acetonitrile, tetrahydrofuran, propionitrile, butyronitrile, methoxyacetonitrile, 3-methoxypropionitrile, valeronitrile, dimethyl carbonate, ethyl methyl carbonate, Examples thereof include ethylene carbonate, propylene carbonate, N-methylpyrrolidone, pentanol, quinoline, N, N-dimethylformamide, ⁇ -butyrolactone, dimethyl sulfoxide, and 1,4-dioxane.
- the electrolyte-containing layer 30 is provided with a non-cyclic saccharide (Japanese Patent Laid-Open No. 2005-093313) and a pyridine-based compound (Japanese Patent Laid-Open No. 2003-331936) for the purpose of improving the power generation efficiency and durability of the photoelectric conversion element. ), Urea derivatives (Japanese Patent Laid-Open No. 2003-168493), and the like may be added.
- this photoelectric conversion element when light (sunlight or ultraviolet light, visible light, or near infrared light equivalent to sunlight) is applied to the dye 13 carried on the working electrode 10, the light is absorbed.
- the excited dye 13 injects electrons into the metal oxide semiconductor layer 12. After the electrons move to the adjacent conductive layer 11B, they reach the counter electrode 20 via an external circuit.
- the electrolyte-containing layer 30 the electrolyte is oxidized so that the oxidized dye 13 is returned (reduced) to the ground state as the electrons move.
- the oxidized electrolyte is reduced by receiving the electrons that have reached the counter electrode 20. In this way, the movement of electrons between the working electrode 10 and the counter electrode 20 and the accompanying oxidation-reduction reaction in the electrolyte-containing layer 30 are repeated. Thereby, continuous movement of electrons occurs, and photoelectric conversion is constantly performed.
- the photoelectric conversion element of the present invention can be manufactured, for example, as follows.
- the working electrode 10 is produced.
- the metal oxide semiconductor layer 12 having a porous structure is formed on the surface of the conductive substrate 11 on which the conductive layer 11B is formed by electrolytic deposition or firing.
- electrolytic deposition for example, an electrolytic bath containing a metal salt to be a metal oxide semiconductor material is set to a predetermined temperature while bubbling with oxygen or air, and the conductive substrate 11 is placed therein. Immerse and apply a constant voltage between the counter electrode. Thereby, a metal oxide semiconductor material is deposited on the conductive layer 11B so as to have a porous structure.
- the counter electrode may be appropriately moved in the electrolytic bath.
- a metal oxide slurry prepared by dispersing a powder of a metal oxide semiconductor material in a dispersion medium is applied to the conductive substrate 11 and dried, followed by firing. Have a porous structure. Subsequently, a dye solution in which the dye 13 containing the novel compound of the present invention represented by the general formula (1) is dissolved in an organic solvent is prepared. By immersing the conductive substrate 11 on which the metal oxide semiconductor layer 12 is formed in this dye solution, the metal oxide semiconductor layer 12 carries the dye 13.
- the concentration of the novel compound of the present invention in the dye solution is preferably 1.0 ⁇ 10 ⁇ 5 to 1.0 ⁇ 10 ⁇ 3 mol / dm 3, and is preferably 5.0 ⁇ 10 ⁇ 5 to 5.0 ⁇ 10 ⁇ 4. More preferred is mol / dm 3 .
- the organic solvent used in the dye solution is not particularly limited as long as it can dissolve the novel compound of the present invention. Specific examples include hydrocarbons such as toluene, benzene and xylene; methanol, ethanol, t-butanol and the like.
- Alcohols such as methyl cellosolve, ethyl cellosolve, butyl cellosolve, butyl diglycol, etc .; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, diacetone alcohol; ethyl acetate, butyl acetate, methoxyethyl acetate, etc.
- esters acrylic acid esters such as ethyl acrylate and butyl acrylate; fluorinated alcohols such as 2,2,3,3-tetrafluoropropanol; chlorinated hydrocarbons such as methylene dichloride, dichloroethane and chloroform; Acetonitrile, include tetrahydrofuran, may be mixed with these organic solvents arbitrarily. Preferably, toluene and acetonitrile are used.
- the counter electrode 20 is produced by forming the conductive layer 22 on one surface of the conductive substrate 21.
- the conductive layer 22 is formed, for example, by sputtering a conductive material.
- a spacer such as a sealant so that the surface of the working electrode 10 carrying the dye 13 and the surface of the counter electrode 20 on which the conductive layer 22 is formed face each other while maintaining a predetermined distance.
- the whole is sealed except for the electrolyte inlet.
- the electrolyte containing layer 30 is formed by injecting an electrolyte between the working electrode 10 and the counter electrode 20 and then sealing the injection port. Thereby, the photoelectric conversion element shown in FIGS. 1 and 2 is completed.
- the dye 13 since the dye 13 includes the compound of the present invention represented by the general formula (1), the dye 13 is supported as compared with the case where a compound different from the compound of the present invention is used.
- the elution of the dye 13 from the supported carrier (metal oxide semiconductor layer 12) to the electrolyte-containing layer 30 can be suppressed. Accordingly, since the amount of the dye 13 carried on the metal oxide semiconductor layer 12 does not decrease, the amount of electrons injected from the dye 13 to the metal oxide semiconductor layer 12 does not decrease. Due to such effects, the durability of the photoelectric conversion element of the present invention can be improved.
- the solid charge transfer layer includes, for example, a material in which carrier movement in the solid is related to electric conduction. As this material, an electron transport material, a hole transport material, or the like is preferable.
- aromatic amines, triphenylene derivatives and the like are preferable.
- organic conductive polymers such as derivatives thereof, polythienylene vinylene or derivatives thereof, polythiophene or derivatives thereof, polyaniline or derivatives thereof, polytoluidine or derivatives thereof, and the like can be given.
- a p-type inorganic compound semiconductor may be used as the hole transport material.
- the p-type inorganic compound semiconductor preferably has a band gap of 2 eV or more, and more preferably 2.5 eV or more.
- the ionization potential of the p-type inorganic compound semiconductor needs to be smaller than the ionization potential of the working electrode 10 from the condition that the holes of the dye can be reduced.
- the preferred range of the ionization potential of the p-type inorganic compound semiconductor varies depending on the dye used, but the ionization potential is preferably in the range of 4.5 eV to 5.5 eV, and more preferably 4.7 eV to 5. More preferably, it is within the range of 3 eV or less.
- Examples of the p-type inorganic compound semiconductor include a compound semiconductor containing monovalent copper.
- Examples of other p-type inorganic compound semiconductors include GaP, NiO, CoO, FeO, Bi 2 O 3 , MoO 2, and Cr 2 O 3 .
- the hole transport material containing the organic conductive polymer is introduced into the electrode by a technique such as a vacuum deposition method, a casting method, a coating method, a spin coating method, a dipping method, an electrolytic polymerization method, or a photoelectrolytic polymerization method. Can do. Also in the case of an inorganic solid compound, it can be introduced into the electrode by a technique such as a casting method, a coating method, a spin coating method, a dipping method, or an electrolytic plating method. A part of the solid charge transfer layer (particularly, having a hole transport material) formed in this way partially penetrates into the gap of the porous structure of the metal oxide semiconductor layer 12 and is in direct contact with it. It is preferable to become.
- the compound of the present invention can improve the conversion efficiency even in a photoelectric conversion element provided with a solid charge transfer layer instead of the electrolyte containing layer 30 as in the case where the electrolyte containing layer 30 is provided.
- the use application of the photoelectric conversion element of the present invention is not limited to the use of the solar cell described above, but may be other use. Examples of other applications include an optical sensor.
- novel compound of the present invention can be suitably used for applications such as a photoelectric conversion element in the form of a support by supporting it on a carrier.
- the novel compounds of the present invention include, in addition, synthetic intermediates such as optical recording materials, pharmaceuticals, agricultural chemicals, fragrances and dyes; various functional materials, various polymer raw materials; photoelectrochemical cells, nonlinear optical devices, electrochromic displays, holograms , Organic semiconductors, organic ELs; silver halide photographic light-sensitive materials, photosensitizers; colorants used in printing inks, ink jets, electrophotographic color toners, cosmetics, plastics, etc .; protein stains, for substance detection Luminescent dyes: Synthetic quartz raw materials, paints, synthetic catalysts, catalyst carriers, surface coat thin film materials, silicone rubber cross-linking agents, binders, and the like can also be used.
- the carrier of the present invention was produced by the following procedure.
- Example 1 1 using support (working electrode) First, a conductive substrate 11 made of a conductive glass substrate (F—SnO 2 ) having a length of 2.0 cm ⁇ width of 1.5 cm ⁇ thickness of 1.1 mm was prepared. Subsequently, a masking tape having a thickness of 70 ⁇ m is pasted on the conductive substrate 11 so as to surround a square of 0.5 cm in length and 0.5 cm in width, and 3 cm 3 of metal oxide slurry is made to have a uniform thickness on this portion. And dried. As the metal oxide slurry, a suspension of titanium oxide powder (TiO 2 , Ti-Nanoxide D manufactured by Solaronix) in water so as to be 10% by weight was used.
- TiO 2 Ti-Nanoxide D manufactured by Solaronix
- the masking tape on the conductive substrate 11 was peeled off, and this substrate was baked at 450 ° C. in an electric furnace to form a metal oxide semiconductor layer 12 having a thickness of about 5 ⁇ m.
- Compound No. 1 was dissolved in toluene to a concentration of 3 ⁇ 10 ⁇ 4 mol / dm 3 to prepare a dye solution.
- the conductive substrate 11 on which the metal oxide semiconductor layer 12 was formed was immersed in the above dye solution, and the working electrode 10 carrying the dye 13 was produced.
- the dye carrying amount before immersion of the stripping solution (Abs. At ⁇ max of the dye) is 100
- the pigment carrying amount after the stripping solution immersion (ratio to the pigment carrying amount before the stripping solution is immersed) Table 3]. It can be said that the closer the pigment carrying amount after peeling is to 100, the higher the peeling resistance.
- Example 2 to 29 and Comparative Examples 1 to 4 Compound No. Working electrode 10 carrying each compound was prepared in the same manner as in Example 1 except that 1 was replaced with the compound of [Table 3], and the peel resistance of the dye was determined. The results are shown in [Table 3].
- the compound of the present invention represented by the general formula (1) has high adsorption durability.
- Examples of the photoelectric conversion element of the present invention and ⁇ Evaluation of conversion efficiency of the photoelectric conversion element> are shown.
- Examples 30 to 42 and Comparative Examples 5 to 8 As shown in FIG. 1, the working electrode 10 using the carrier (working electrode) produced in Examples 1 to 11, 27 to 29 and Comparative Examples 1 to 4 and an ITO electrode (Nishinoda) as the conductive substrate 21 are used.
- the counter electrode 20 produced by coating graphite fine particles (conductive layer 22) on Denko Co., Ltd.) is opposed to each other with a spacer (63 ⁇ m), and an electrolyte-containing layer 30 is disposed between them.
- Examples of the photoelectric conversion element of the present invention in which the metal oxide semiconductor is changed and ⁇ evaluation of conversion efficiency of the photoelectric conversion element> are shown.
- Examples 43 to 45 and Comparative Example 9 Compound No.
- Working electrode 10 carrying each compound was produced in the same manner as in Example 1 except that 1 was replaced with the compound of [Table 4A] and the titanium oxide powder was changed to zinc oxide (ZnO, manufactured by Solar). .
- the conversion efficiency was measured by the same operation as in Example 30. The results are shown in [Table 4A].
- ⁇ Light resistance evaluation> The support (working electrode) produced in Examples 4 and 7 and Comparative Examples 1 and 2 was evaluated for light resistance. The evaluation was performed by irradiating the working electrode with light of 55000 lux for 4 hours, and calculating the change in ⁇ max of the UV absorption spectrum with 100 being before irradiation. Specifically, the Abs. And Abs. was measured, and “(Abs. After irradiation / Abs. Before irradiation) ⁇ 100” was determined to be a light resistance value. The results are shown in [Table 5].
- the carrier of the present invention is excellent in exfoliation resistance and light resistance, and when used as a photoelectric conversion element, it is clear that high conversion efficiency is exhibited.
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Abstract
Description
色素増感型光電変換素子の主たる用途の一つである太陽電池においては、その用途の特性上高い耐久性が要求されており、公知の色素及び該色素を用いた光電変換素子では未だ十分な特性を得られていない。
本発明の担持体に用いられる材料(担体)としては、アクリル樹脂、フッ素樹脂等の有機樹脂、酸化チタン、酸化亜鉛、酸化アルミニウム等の金属酸化物、酸化ケイ素、ゼオライト、活性炭等が挙げられ、表面が多孔質であるものが好ましい。担持させる化合物としては、上記一般式(1)で表される化合物であることを特徴としている。該化合物は、炭化水素オキシ基とSiとが結合したシリル基を有することで、担体への吸着力が高い。該化合物を担体に担持させる方法としては、公知の気層吸着、液層吸着等の方法を用いることが可能であるが、例えば、液層吸着の例として、本発明の化合物を溶媒に溶解し、その溶液に上記担体を浸漬することで吸着させる方法が挙げられる。
置換されていてもよい炭化水素基としては、脂肪族炭化水素基、無置換芳香族炭化水素基、脂肪族炭化水素基で置換された芳香族炭化水素基、無置換ヘテロ環基及び脂肪族炭化水素基で置換されたヘテロ環基が挙げられる。
炭素原子数1~4の脂肪族炭化水素基としては、例えば、メチル、エチル、プロピル、イソプロピル、ブチル、s-ブチル、t-ブチル、イソブチル、シクロプロピル、シクロブチル等の直鎖、分岐及び環状のアルキル基が挙げられ、炭素原子数1~4の脂肪族炭化水素基は、-O-、-COO-、-OCO-、-CO-、-S-、-SO-、-SO2-、-NR12-、-C=C-、-C≡C-で中断されていてもよく、R12は炭素原子数1~4の脂肪族炭化水素基であり、その例としては上記炭素原子数1~4の脂肪族炭化水素基と同じであり、中断する基に炭素原子を含む場合、中断される基を含めた炭素原子数が1~4である。
上記芳香族炭化水素環基としては、無置換芳香族炭化水素環基、脂肪族炭化水素基で置換された芳香族炭化水素環基等が挙げられ、上記芳香族ヘテロ環基としては、無置換芳香族ヘテロ環基、脂肪族炭化水素基で置換された芳香族ヘテロ環基等が挙げられる。
炭素原子数1~20の脂肪族炭化水素基としては、例えば、メチル、エチル、プロピル、イソプロピル、ブチル、s-ブチル、t-ブチル、イソブチル、アミル、イソアミル、t-アミル、ヘキシル、ヘプチル、イソヘプチル、t-ヘプチル、n-オクチル、イソオクチル、t-オクチル、ノニル、シクロプロピル、シクロブチル、シクロペンチル、シクロヘキシル、シクロヘプチル、シクロオクチル、シクロノニル、シクロデシル等の直鎖、分岐及び環状のアルキル基が挙げられ、炭素原子数1~20の脂肪族炭化水素基は、-O-、-COO-、-OCO-、-CO-、-S-、-SO-、-SO2-、-NR13-、-C=C-、-C≡C-で中断されていてもよく、R13は炭素原子数1~20の脂肪族炭化水素基であり、その例としては上記炭素原子数1~20の脂肪族炭化水素基と同じであり、中断する基に炭素原子を含む場合、中断される基を含めた炭素原子数が1~20である。
上記の置換されていてもよい脂肪族炭化水素基としては、例えば前述の炭素原子数1~20の脂肪族炭化水素基が挙げられ、それらを置換してもよい置換基は、芳香族炭化水素環基及び芳香族ヘテロ環基を置換してもよい基として挙げたものと同様である。
R7及びR8で表される上記の置換されていてもよい炭化水素基は、R1、R2及びR3で表される置換されていてもよい炭化水素基として後に挙げるものと同様である。
尚、以下には、置換基を有していないものを示しているが、上記の通り、A1は置換基を有していてもよく、A2中の水素原子は置換基で置換されていてもよい。また、以下のA(16)~(23)において、複数の環にまたがって記載されている結合手は、それらの環を構成する炭素原子のいずれかに結合することを意味する(以下同様)。
上記芳香族炭化水素基としては、フェニル、ナフチル、シクロヘキシルフェニル、ビフェニル、ターフェニル、フルオレイル、チオフェニルフェニル、フラニルフェニル、2’-フェニル-プロピルフェニル、ベンジル、ナフチルメチル等が挙げられ、上記脂肪族炭化水素基としては、例えばA1の説明で用いた炭素原子数1~20の脂肪族炭化水素基が挙げられ、上記脂肪族炭化水素基で置換された芳香族炭化水素基としては、上記脂肪族炭化水素基で置換されたフェニル、ナフチル、ベンジル等が挙げられる。
これらの炭化水素基を置換してもよい基としては、フッ素原子、塩素原子、臭素原子、ヨウ素原子、シアノ基、ニトロ基、水酸基、チオール基、-NR7R8基等が挙げられ、R7及びR8が表す基は、A2において説明したR7及びR8と同様である。
尚、下記部分構造(3)及び(3-1)~(3-12)において、A1からA2への結合手は記載を省略している。下記部分構造(3-1)~(3-12)においては、A1からA2への結合手は、芳香族炭化水素環及び芳香族ヘテロ環を構成するいずれの炭素原子に付いていてもよい。
上記部分構造(3)を表す(3-11)及び(3-12)において、M2の金属元素としては、4配位又は6配位が可能な金属が挙げられ、より好ましくはRu、Fe、Os、Cu、W、Cr、Mo、Ni、Pd、Pt、Co、Ir、Rh、Re、Mn、Znであり、更に好ましくはRu、Fe、Os、Cuであり、特に好ましくはRuである。
本発明の光電変換素子は、色素増感型光電変換素子であり、色素として本発明の新規化合物を用いる点以外は、従来の色素増感型光電変換素子と同様とすることができる。以下、本発明の光電変換素子の代表的な構成例について、図1及び図2を参照して説明する。
作用電極10は、外部回路に対して、負極として機能するものである。導電性基板11は、例えば、絶縁性の基板11Aの表面に導電層11Bを設けたものである。
有機金属錯体化合物としては、芳香族複素環内にある窒素アニオンと金属カチオンとで形成されるイオン性の配位結合と、窒素原子又はカルコゲン原子と金属カチオンとの間に形成される非イオン性配位結合の両方を有する有機金属錯体化合物や、酸素アニオン又は硫黄アニオンと金属カチオンとで形成されるイオン性の配位結合と、窒素原子又はカルコゲン原子と金属カチオンとの間に形成される非イオン性配位結合の両方を有する有機金属錯体化合物等が挙げられる。具体的には、銅フタロシアニン、チタニルフタロシアニン、コバルトフタロシアニン、ニッケルフタロシアニン、鉄フタロシアニン等の金属フタロシアニン系色素、金属ナフタロシアニン系色素、金属ポルフィリン系色素、金属アザポルフィリン系色素ならびにルテニウム、鉄、オスミウムを用いたビピリジル金属錯体、ターピリジル金属錯体、フェナントロリン金属錯体、ビシンコニン酸金属錯体、アゾ金属錯体あるいはキノリノール金属錯体等のルテニウム錯体等が挙げられる。
MK-2 Dye(シグマアルドリッチ製、0.10mmol、96mg)、塩化オキサリル(0.11mmol、14mg)、ジメチルホルムアミド(0.01ml)及びクロロホルム(2ml)をフラスコに仕込み、25℃で1時間撹拌した。10℃まで冷却した後、N,N-ジイソプロピルエチルアミン(0.20mmol、26mg)及び(トリエトキシシリルメチル)ヘキシルアミン(0.10mmol、28mg)を加えて、更に1時間撹拌した。反応液に水(2ml)を加え、油水分液を行った。得られた有機層をシリカゲルカラムクロマトグラフィー(移動相;クロロホルム)により精製することにより、紫色固体を108mg(収率89%)得た。得られた固体が、化合物No.1であることをUV-VIS(λmax)、1H-NMRを用いて確認した。データを〔表1〕及び〔表2-1〕に示す。
目的化合物に対応したカルボン酸又はスルホン酸を有する化合物及びアミン化合物を用いた以外は合成例1と同様の手法で化合物No.2~No.24、61、62、70~72を合成した。得られた化合物の外観及び収率を〔表1〕に示す。合成した化合物が目的化合物であることは、合成例1と同様に確認した。データを〔表1〕、〔表2-1〕、〔表2-2〕及び〔表2-3〕に示す。
まず、縦2.0cm×横1.5cm×厚さ1.1mmの導電性ガラス基板(F-SnO2)よりなる導電性基板11を用意した。続いて、導電性基板11に、縦0.5cm×横0.5cmの四角形を囲むように厚さ70μmのマスキングテープを貼り、この部分に金属酸化物スラリー3cm3を一様の厚さとなるように塗布して乾燥させた。金属酸化物スラリーとしては、10重量%となるように酸化チタン粉末(TiO2、Solaronix社製Ti-NanoxideD)を、水に懸濁したものを用いた。続いて、導電性基板11上のマスキングテープを剥がし取り、この基板を電気炉により450℃で焼成し、厚さ約5μmの金属酸化物半導体層12を形成した。続いて、化合物No.1を3×10-4mol/dm3の濃度になるようにトルエンに溶解させて、色素溶液を調製した。続いて、金属酸化物半導体層12が形成された導電性基板11を上記の色素溶液に浸漬し、色素13を担持させた作用電極10を作製した。
作製した作用電極10を25℃、24時間の条件で、剥離液(アセトニトリル:水=99:1)に浸漬した。剥離液浸漬前の色素担持量(色素のλmaxにおけるAbs.)を100としたときの、剥離液浸漬後の色素担持量(剥離液浸漬前の色素担持量に対する割合)を、耐剥離性として〔表3〕に示した。剥離後の色素担持量が100に近いほど耐剥離性が高いといえる。
化合物No.1を〔表3〕の化合物に替えた以外は実施例1と同様の操作により、各化合物を担持させた作用電極10を作製し、色素の耐剥離性を求めた。結果を〔表3〕に示す。
(実施例30~42及び比較例5~8)
図1に示すように、上記実施例1~11、27~29及び比較例1~4で作製した担持体(作用電極)を用いた作用電極10と、導電性基板21としてITO電極(西野田電工(株)製)上に黒鉛微粒子(導電層22)をコーティングして作製した対向電極20とを、スペーサー(63μm)を介して対向させ、それらの間に電解質含有層30を配し、これらをクリップで固定し、電解質含有層30に電解液〔アセトニトリルに対して、4-t-ブチルピリジン(0.5mol/dm3)、ヨウ化リチウム(0.5mol/dm3)、ヨウ素(0.05mol/dm3)を、それぞれ所定の濃度になるように混合したもの〕を浸透させ、光電変換素子を作製した。セル上部を開口部1cm2のマスクで覆い、AM-1.5(1000W/m2)のソーラーシミュレーターを用いて変換効率を測定した。結果を、〔表4〕に示す。
(実施例43~45及び比較例9)
化合物No.1を〔表4A〕の化合物に替え、酸化チタン粉末を酸化亜鉛(ZnO、ソーラー社製)に変更した以外は実施例1と同様の操作により、各化合物を担持させた作用電極10を作製した。得られた作用電極10を用いて、実施例30と同様の操作により変換効率を測定した。結果を〔表4A〕に示す。
上記実施例4、7及び比較例1、2で作製した担持体(作用電極)について耐光性評価を行った。評価は、該作用電極に55000ルクスの光を4時間照射し、UV吸収スペクトルのλmaxの変化を、照射前を100として算出した。具体的には、λmaxにおける照射後のAbs.及び照射前のAbs.を測定し、「(照射後のAbs./照射前のAbs.)×100」を求め、耐光性の値とした。結果を〔表5〕に示す。
Claims (8)
- 下記一般式(1)で表される新規化合物。
(式中、Yは、基中に-CO-NR4-又は-SO2-NR4-を有する置換されていてもよい炭素原子数1~20の炭化水素基であり、Zは共役系の基であり、R1、R2及びR3は、置換されていてもよい炭化水素基又は置換されていてもよい炭化水素オキシ基を表し、R1、R2及びR3の少なくとも一つが置換されていてもよい炭化水素オキシ基であり、R4は、水素原子又は置換基を有していてもよい炭素原子数1~20の炭化水素基を表し、R4とZは、互いに連結して環を形成してもよい。
但し、Yは、下記の部分構造式(Y-11)及び(Y-12)で表わされる基を除く。)
(式中、R4は上記一般式(1)において説明したR4と同じであり、式中の水素原子は、フッ素原子、塩素原子、臭素原子、ヨウ素原子、シアノ基、ニトロ基、-OR7基、-SR7基又は-NR7R8基により置換されていてもよく、式中のベンゼン環は炭素原子数1~4の脂肪族炭化水素基により置換されていてもよい。) - 上記一般式(1)におけるR1、R2及びR3が、直鎖又は分岐鎖脂肪族炭化水素オキシ基である請求項1に記載の新規化合物。
- 上記一般式(1)におけるZが、下記部分構造式(2)で表される請求項1~3の何れか一項に記載の新規化合物。
(式中、A1は置換されていてもよい芳香族炭化水素環基又は置換されていてもよい芳香族ヘテロ環基であり、A2は直接結合又は下記式(A2-1)~(A2-15)で表される基から選ばれる基を1~7個連結した基であり、R5及びR6は、置換されていてもよい炭化水素基を表し、R5及びR6は、互いに連結して環を形成してもよく、R5及びR6は互いに独立してA1と連結して環を形成してもよい。)
(式中、Xは、S、O、NRを表し、Rは水素原子又は置換されていてもよい炭化水素基を表し、式中の水素原子は、フッ素原子、塩素原子、ヨウ素原子、シアノ基、ニトロ基、-OR7基、-SR7基、-NR7R8基又は置換されていてもよい脂肪族炭化水素基で置換されていてもよく、R7及びR8は、水素原子又は置換されていてもよい炭化水素基を表す。) - 上記一般式(1)におけるR1、R2及びR3が、直鎖又は分岐鎖脂肪族炭化水素オキシ基である請求項6に記載の担持体。
- 請求項6又は7に記載の担持体を有する電極を備えた光電変換素子。
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- 2012-08-21 JP JP2013544156A patent/JP6145407B2/ja not_active Expired - Fee Related
- 2012-08-21 KR KR1020147008991A patent/KR20140094507A/ko not_active Abandoned
- 2012-08-21 US US14/350,171 patent/US9530571B2/en not_active Expired - Fee Related
- 2012-08-21 CN CN201280046590.0A patent/CN103827126B/zh not_active Expired - Fee Related
- 2012-08-21 EP EP12849937.3A patent/EP2781555A4/en not_active Withdrawn
- 2012-08-21 WO PCT/JP2012/071093 patent/WO2013073243A1/ja not_active Ceased
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20131621A1 (it) * | 2013-10-01 | 2015-04-02 | Cnrs Ct Nat De La Rech He Scient | Colorante organico per una cella solare sensibilizzata con colorante |
| WO2015049640A3 (en) * | 2013-10-01 | 2015-08-06 | Eni S.P.A. | Organic dye for a dye-sensitized solar cell |
| US9997299B2 (en) | 2013-10-01 | 2018-06-12 | Eni S.P.A. | Organic dye for a dye-sensitized solar cell |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI598354B (zh) | 2017-09-11 |
| CN103827126B (zh) | 2017-05-17 |
| KR20140094507A (ko) | 2014-07-30 |
| EP2781555A4 (en) | 2015-10-07 |
| US9530571B2 (en) | 2016-12-27 |
| EP2781555A1 (en) | 2014-09-24 |
| TW201321391A (zh) | 2013-06-01 |
| JPWO2013073243A1 (ja) | 2015-04-02 |
| CN103827126A (zh) | 2014-05-28 |
| JP6145407B2 (ja) | 2017-06-14 |
| US20140261647A1 (en) | 2014-09-18 |
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